Camera optical lens including six lenses of +--++- refractive powers

ABSTRACT

The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens; a fifth lens; and a sixth lens. The camera optical lens satisfies following conditions: 5.00≤f1/f≤10.00; and 5.00≤R3/d3≤20.00. The camera optical lens can achieve a high imaging performance while obtaining a low TTL.

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, and moreparticularly, to a camera optical lens suitable for handheld terminaldevices, such as smart phones or digital cameras, and imaging devices,such as monitors or PC lenses.

BACKGROUND

With the emergence of smart phones in recent years, the demand forminiature camera lens is increasing day by day, but in general thephotosensitive devices of camera lens are nothing more than ChargeCoupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor(CMOS sensor), and as the progress of the semiconductor manufacturingtechnology makes the pixel size of the photosensitive devices becomesmaller, plus the current development trend of electronic productstowards better functions and thinner and smaller dimensions, miniaturecamera lenses with good imaging quality therefore have become amainstream in the market. In order to obtain better imaging quality, thelens that is traditionally equipped in mobile phone cameras adopts athree-piece or four-piece lens structure. Also, with the development oftechnology and the increase of the diverse demands of users, and as thepixel area of photosensitive devices is becoming smaller and smaller andthe requirement of the system on the imaging quality is improvingconstantly, the five-piece, six-piece and seven-piece lens structuresgradually appear in lens designs. There is an urgent need forultra-thin, wide-angle camera lenses with good optical characteristicsand fully corrected chromatic aberration.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood withreference to the following drawings. The components in the drawings arenot necessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the present disclosure. Moreover,in the drawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 1 of the present disclosure;

FIG. 2 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 1;

FIG. 3 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 1;

FIG. 4 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 1;

FIG. 5 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 2 of the present disclosure;

FIG. 6 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 5;

FIG. 7 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 5; and

FIG. 8 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 5.

DESCRIPTION OF EMBODIMENTS

The present disclosure will hereinafter be described in detail withreference to several exemplary embodiments. To make the technicalproblems to be solved, technical solutions and beneficial effects of thepresent disclosure more apparent, the present disclosure is described infurther detail together with the figure and the embodiments. It shouldbe understood the specific embodiments described hereby is only toexplain the disclosure, not intended to limit the disclosure.

Embodiment 1

Referring to FIG. 1, the present disclosure provides a camera opticallens 10. FIG. 1 shows the camera optical lens 10 according to Embodiment1 of the present disclosure. The camera optical lens 10 includes 6lenses. Specifically, the camera optical lens 10 includes, from anobject side to an image side, an aperture S1, a first lens L1, a secondlens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixthlens L6. An optical element such as an optical filter GF can be arrangedbetween the sixth lens L6 and an image plane Si.

The first lens L1 is made of a plastic material, the second lens L2 ismade of a plastic material, the third lens L3 is made of a plasticmaterial, the fourth lens L4 is made of a plastic material, the fifthlens L5 is made of a plastic material, and the sixth lens L6 is made ofa plastic material.

The second lens L2 has a negative refractive power, and the third lensL3 has a negative refractive power.

Here, a focal length of the camera optical lens 10 is defined as f, anda focal length of the first lens L1 is defined as f1. The camera opticallens 10 should satisfy a condition of 5.00≤f1/f≤10.00, which specifies aratio of the focal length f1 of the first lens L1 and the focal length fof the camera optical lens 10. If the lower limit of the specified valueis exceeded, although it would facilitate development of ultra-thinlenses, the positive refractive power of the first lens L1 will be toostrong, and thus it is difficult to correct the problem like anaberration and it is also unfavorable for development of wide-anglelenses. On the contrary, if the upper limit of the specified value isexceeded, the positive refractive power of the first lens L1 wouldbecome too weak, and it is then difficult to develop ultra-thin lenses.Preferably, 6.25≤f1/f≤9.75.

A curvature radius of the object side surface of the second lens isdefined as R3, and an on-axis thickness of the second lens L2 is definedas d3. The camera optical lens 10 further satisfies a condition of5.00≤R3/d3≤20.00, which specifies a shape of the second lens L2. Out ofthis range, a development towards ultra-thin and wide-angle lenses wouldmake it difficult to correct the problem of the aberration. Preferably,5.87≤R3/d3≤14.20.

A total optical length from an object side surface of the first lens L1to an image plane of the camera optical lens 10 along an optic axis isdefined as TTL. When the focal length of the camera optical lens, thefocal length of the first lens, the curvature radius of the object sidesurface of the second lens and the on-axis thickness of the second lenssatisfy the above conditions, the camera optical lens will have theadvantage of high performance and satisfy the design requirement of alow TTL.

In this embodiment, the object side surface of the first lens L1 isconvex in a paraxial region, an image side surface of the first lens L1is concave in the paraxial region, and the first lens L2 has a positiverefractive power.

A curvature radius of the object side surface of the first lens L1 isdefined as R1, and a curvature radius of the image side surface of thefirst lens L1 is defined as R2. The camera optical lens 10 furthersatisfies a condition of 64.28≤(R1+R2)/(R1−R2)≤200.23. This canreasonably control a shape of the first lens L1 in such a manner thatthe first lens L1 can effectively correct a spherical aberration of thecamera optical lens. Preferably, 102.84≤(R1+R2)/(R1−R2)≤160.19.

An on-axis thickness of the first lens L1 is defined as d1. The cameraoptical lens 10 further satisfies a condition of 0.05≤d1/TTL≤0.19. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.08≤d1/TTL≤0.15.

In this embodiment, an object side surface of the second lens L2 isconvex in the paraxial region, and an object side surface of the secondlens L2 is concave in the paraxial region.

The focal length of the camera optical lens 10 is f, and a focal lengthof the second lens L2 is f2. The camera optical lens 10 furthersatisfies a condition of −1.05*10¹⁰≤f2/f≤−133.43. By controlling thenegative refractive power of the second lens L2 within the reasonablerange, correction of the aberration of the optical system can befacilitated. Preferably, −6.55*10⁹≤f2/f≤−166.79.

A curvature radius of the object side surface of the second lens L2 isdefined as R3, and a curvature radius of the image side surface of thesecond lens L2 is defined as R4. The camera optical lens 10 furthersatisfies a condition of 16.35≤(R3+R4)/(R3−R4)≤57.77. This canreasonably control a shape of the second lens L2. Out of this range, adevelopment towards ultra-thin and wide-angle lenses would make itdifficult to correct the problem of the aberration. Preferably,26.17≤(R3+R4)/(R3−R4)≤46.22.

An on-axis thickness of the second lens L2 is defined as d3. The cameraoptical lens 10 further satisfies a condition of 0.02≤d3/TTL≤0.07. Thisfacilitates achieving ultra-thin lenses.

In this embodiment, an object side surface of the third lens L3 isconvex in the paraxial region, and an image side surface of the thirdlens L3 is concave in the paraxial region.

The focal length of the camera optical lens 10 is f, and a focal lengthof the third lens L3 is f3. The camera optical lens 10 further satisfiesa condition of −9.17*10⁸≤f3/f≤−523.43. The appropriate distribution ofthe refractive power leads to a better imaging quality and a lowersensitivity. Preferably, −5.73*10⁸≤f3/f≤−654.29.

A curvature radius of the object side surface of the third lens L3 isdefined as R5, and a curvature radius of the image side surface of thethird lens L3 is defined as R6. The camera optical lens 10 furthersatisfies a condition of 23.63≤(R5+R6)/(R5−R6)≤79.23, which specifies ashape of the third lens L3. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,37.81≤(R5+R6)/(R5−R6)≤63.39.

An on-axis thickness of the third lens L3 is defined as d5. The cameraoptical lens 10 further satisfies a condition of 0.04≤d5/TTL≤0.13. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.06≤d5/TTL≤0.10.

In this embodiment, an object side surface of the fourth lens L4 isconvex in the paraxial region, an image side surface of the fourth lensL4 is convex in the paraxial region, and the fourth lens L4 has apositive refractive power.

The focal length of the camera optical lens 10 is f, and a focal lengthof the fourth lens L4 is f4. The camera optical lens 10 furthersatisfies a condition of 0.70≤f4/f≤2.18. The appropriate distribution ofthe refractive power leads to a better imaging quality and a lowersensitivity. Preferably, 1.12≤f4/f≤1.74.

A curvature radius of the object side surface of the fourth lens L4 isdefined as R7, and a curvature radius of the image side surface of thefourth lens L4 is defined as R8. The camera optical lens 10 furthersatisfies a condition of −1.82≤(R7+R8)/(R7−R8)≤−0.60, which specifies ashape of the fourth lens L4. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,−1.14≤(R7+R8)/(R7−R8)≤−0.75.

An on-axis thickness of the fourth lens L4 is defined as d7. The cameraoptical lens 10 further satisfies a condition of 0.04≤d7/TTL≤0.12. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.06≤d7/TTL≤0.10.

In this embodiment, an object side surface of the fifth lens L5 isconvex in the paraxial region, an image side surface of the fifth lensL5 is convex in the paraxial region, and the fifth lens L5 has apositive refractive power.

The focal length of the camera optical lens 10 is f, and a focal lengthof the fifth lens L5 is f5. The camera optical lens 10 further satisfiesa condition of 0.61≤f5/f≤1.92. This can effectively make a light angleof the camera lens gentle and reduce the tolerance sensitivity.Preferably, 0.97≤f5/f≤1.54.

A curvature radius of the object side surface of the fifth lens L5 isdefined as R9, and a curvature radius of the image side surface of thefifth lens L5 is defined as R10. The camera optical lens 10 furthersatisfies a condition of −1.27≤(R9+R10)/(R9−R10)≤−0.41, which specifiesa shape of the fifth lens L5. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,−0.79≤(R9+R10)/(R9−R10)≤−0.51.

An on-axis thickness of the fifth lens L5 is defined as d9. The cameraoptical lens 10 further satisfies a condition of 0.05≤d9/TTL≤0.17. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.09≤d9/TTL≤0.13.

In this embodiment, an object side surface of the sixth lens L6 isconvex in the paraxial region, an image side surface of the sixth lensL6 is concave in the paraxial region, and the sixth lens L6 has anegative refractive power.

The focal length of the camera optical lens 10 is f, and a focal lengthof the sixth lens L6 is f6. The camera optical lens 10 further satisfiesa condition of −2.35≤f6/f≤−0.68. The appropriate distribution of therefractive power leads to a better imaging quality and a lowersensitivity. Preferably, −1.47≤f6/f≤−0.85.

A curvature radius of the object side surface of the sixth lens L6 isdefined as R11, and a curvature radius of the image side surface of thesixth lens L6 is defined as R12. The camera optical lens 10 furthersatisfies a condition of 0.77≤(R11+R12)/(R11−R12)≤2.45, which specifiesa shape of the sixth lens L6. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,1.23≤(R11+R12)/(R11−R12)≤1.96.

A thickness on-axis of the sixth lens L6 is defined as d11. The cameraoptical lens 10 further satisfies a condition of 0.02≤d11/TTL≤0.15. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.04≤d11/TTL≤0.12.

In this embodiment, the focal length of the camera optical lens 10 is f,and a combined focal length of the first lens L1 and the second lens L2is f12. The camera optical lens 10 further satisfies a condition of3.69≤f12/f≤13.39. This can eliminate the aberration and distortion ofthe camera optical lens while suppressing a back focal length of thecamera optical lens, thereby maintaining miniaturization of the cameralens system. Preferably, 5.90≤f12/f≤10.71.

In this embodiment, the total optical length TTL of the camera opticallens 10 is smaller than or equal to 5.26 mm, which is beneficial forachieving ultra-thin lenses. Preferably, the total optical length TTL ofthe camera optical lens 10 is smaller than or equal to 5.02 mm.

In this embodiment, the camera optical lens 10 has a large F number,which is smaller than or equal to 1.93. The camera optical lens 10 has abetter imaging performance. Preferably, the F number of the cameraoptical lens 10 is smaller than or equal to 1.89.

With such design, the total optical length TTL of the camera opticallens 10 can be made as short as possible, and thus the miniaturizationcharacteristics can be maintained.

In the following, examples will be used to describe the camera opticallens 10 of the present disclosure. The symbols recorded in each examplewill be described as follows. The focal length, on-axis distance,curvature radius, on-axis thickness, inflexion point position, andarrest point position are all in units of mm.

TTL: Optical length (the total optical length from the object sidesurface of the first lens to the image plane of the camera optical lensalong the optic axis) in mm.

Preferably, inflexion points and/or arrest points can be arranged on theobject side surface and/or image side surface of the lens, so as tosatisfy the demand for the high quality imaging. The description belowcan be referred to for specific implementations.

The design information of the camera optical lens 10 in Embodiment 1 ofthe present disclosure is shown in Tables 1 and 2.

TABLE 1 R d nd vd S1 ∞ d0= −0.277 R1 1.652 d1= 0.490 nd1 1.5457 v1 55.95R2 1.626 d2= 0.068 R3 1.555 d3= 0.231 nd2 1.6672 v2 20.41 R4 1.463 d4=0.137 R5 3.605 d5= 0.400 nd3 1.5457 v3 55.95 R6 3.456 d6= 0.030 R7 2.909d7= 0.363 nd4 1.5456 v4 56.03 R8 −60.648 d8= 0.453 R9 3.012 d9= 0.527nd5 1.5457 v5 55.95  R10 −12.558  d10= 0.678  R11 6.860  d11= 0.465 nd61.5456 v6 56.03  R12 1.656  d12= 0.350  R13 ∞  d13= 0.210 ndg 1.5168 vg64.17  R14 ∞  d14= 0.300

In the table, meanings of various symbols will be described as follows.

S1: aperture;

R: curvature radius of an optical surface, a central curvature radiusfor a lens;

R1: curvature radius of the object side surface of the first lens L1;

R2: curvature radius of the image side surface of the first lens L1;

R3: curvature radius of the object side surface of the second lens L2;

R4: curvature radius of the image side surface of the second lens L2;

R5: curvature radius of the object side surface of the third lens L3;

R6: curvature radius of the image side surface of the third lens L3;

R7: curvature radius of the object side surface of the fourth lens L4;

R8: curvature radius of the image side surface of the fourth lens L4;

R9: curvature radius of the object side surface of the fifth lens L5;

R10: curvature radius of the image side surface of the fifth lens L5;

R11: curvature radius of the object side surface of the sixth lens L6;

R12: curvature radius of the image side surface of the sixth lens L6;

R13: curvature radius of an object side surface of the optical filterGF;

R14: curvature radius of an image side surface of the optical filter GF;

d: on-axis thickness of a lens and an on-axis distance between lenses;

d0: on-axis distance from the aperture S1 to the object side surface ofthe first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image side surface of the first lens L1 tothe object side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image side surface of the second lens L2to the object side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image side surface of the third lens L3 tothe object side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image side surface of the fourth lens L4to the object side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image side surface of the fifth lens L5to the object side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image side surface of the sixth lens L6to the object side surface of the optical filter GF;

d13: on-axis thickness of the optical filter GF;

d14: on-axis distance from the image side surface of the optical filterGF to the image plane;

nd: refractive index of d line;

nd1: refractive index of d line of the first lens L1;

nd2: refractive index of d line of the second lens L2;

nd3: refractive index of d line of the third lens L3;

nd4: refractive index of d line of the fourth lens L4;

nd5: refractive index of d line of the fifth lens L5;

nd6: refractive index of d line of the sixth lens L6;

ndg: refractive index of d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

vg: abbe number of the optical filter GF.

Table 2 shows aspherical surface data of the camera optical lens 10 inEmbodiment 1 of the present disclosure.

TABLE 2 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10A12 A14 A16 R1  6.5853E−01 −3.1747E−02  4.2516E−02 −1.5384E−01 2.9366E−01 −3.2139E−01  1.7453E−01 −2.9363E−02 R2 −1.5137E+01−8.7675E−02  2.2165E−01 −3.1881E−01  3.9247E−01 −2.2460E−01 −2.2736E−02 1.0629E−01 R3 −4.2791E+00 −4.2586E−01  5.3456E−01 −2.7784E−01−5.6494E−03  6.6752E−02 −1.3964E−01  1.1478E−01 R4 −1.0065E+00−2.0483E−01  3.1589E−01 −4.6042E−01  1.2931E+00 −2.3864E+00  2.1029E+00−7.0838E−01 R5  1.0230E+01 −3.1047E−02 −3.3706E−02  1.3003E−01−8.3569E−01  1.5960E+00 −1.3295E+00  4.8191E−01 R6 −6.3157E+01−3.5030E−01 −1.2366E−01  1.4770E+00 −2.7524E+00  2.4422E+00 −1.1099E+00 2.7447E−01 R7  2.7651E+00 −6.6364E−01  4.2333E−01  1.3314E−01 4.5526E−01 −1.7906E+00  1.7088E+00 −5.2038E−01 R8  2.7382E+03−2.6429E−01  5.7183E−02  3.0351E−01 −4.1175E−01  2.0866E−01 −4.7884E−02 4.7227E−03 R9 −4.6640E+01 −1.2205E−02 −1.5107E−01 −6.1206E−02 3.4470E−01 −3.2952E−01  1.3805E−01 −2.1869E−02  R10 −6.5114E+01−7.4724E−02 −1.4375E−02 −8.8447E−02  1.4996E−01 −7.8150E−02  1.7134E−02−1.2111E−03  R11 −2.1919E+03 −3.0073E−01  1.3066E−01  2.0546E−03−1.5133E−02  4.2487E−03 −4.4512E−04  1.2433E−05  R12 −1.5764E+01−1.5986E−01  1.1949E−01 −5.1554E−02  1.4217E−02 −2.4711E−03  2.4476E−04−1.0438E−05

Here, K is a conic coefficient, and A4, A6, A8, A10, A12, A14 and A16are aspheric surface coefficients.

IH: Image Heighty=(x ² /R)/[1+{1−(k+1)(x ² /R ²)}^(1/2)]+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰+A12x ¹² +A14x ¹⁴ +A16x ¹⁶  (1)

For convenience, an aspheric surface of each lens surface uses theaspheric surfaces shown in the above formula (1). However, the presentdisclosure is not limited to the aspherical polynomials form shown inthe formula (1).

Table 3 and Table 4 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 10 according toEmbodiment 1 of the present disclosure. P1R1 and P1R2 represent theobject side surface and the image side surface of the first lens L1,P2R1 and P2R2 represent the object side surface and the image sidesurface of the second lens L2, P3R1 and P3R2 represent the object sidesurface and the image side surface of the third lens L3, P4R1 and P4R2represent the object side surface and the image side surface of thefourth lens L4, P5R1 and P5R2 represent the object side surface and theimage side surface of the fifth lens L5, and P6R1 and P6R2 represent theobject side surface and the image side surface of the sixth lens L6. Thedata in the column named “inflexion point position” refers to verticaldistances from inflexion points arranged on each lens surface to theoptic axis of the camera optical lens 10. The data in the column named“arrest point position” refers to vertical distances from arrest pointsarranged on each lens surface to the optic axis of the camera opticallens 10.

TABLE 3 Number of Inflexion Inflexion Inflexion Inflexion inflexionpoint point point point points position 1 position 2 position 3 position4 P1R1 0 P1R2 0 P2R1 1 0.415 P2R2 0 P3R1 0 P3R2 2 0.225 0.845 P4R1 20.225 0.805 P4R2 0 P5R1 2 0.405 1.135 P5R2 1 1.065 P6R1 2 0.135 1.145P6R2 1 0.415

TABLE 4 Number of Arrest point Arrest point arrest points position 1position 2 P1R1 0 P1R2 0 P2R1 0 P2R2 0 P3R1 0 P3R2 1 0.405 P4R1 1 0.405P4R2 0 P5R1 1 0.685 P5R2 1 1.345 P6R1 1 0.255 P6R2 1 1.135

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and650 nm after passing the camera optical lens 10 according toEmbodiment 1. FIG. 4 illustrates a field curvature and a distortion oflight with a wavelength of 555 nm after passing the camera optical lens10 according to Embodiment 1, in which a field curvature S is a fieldcurvature in a sagittal direction and T is a field curvature in ameridian direction.

Table 9 shows various values of Embodiments 1 and 2 and valuescorresponding to parameters which are specified in the above conditions.

As shown in Table 9, Embodiment 1 satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 1.880 mm. The image height of 1.0H is 2.9335 mm. The FOV (fieldof view) is 78.98°. Thus, the camera optical lens has a wide-angle andis ultra-thin. Its on-axis and off-axis chromatic aberrations are fullycorrected, thereby achieving excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 inEmbodiment 2 of the present disclosure.

TABLE 5 R d nd vd S1 ∞ d0= −0.286 R1 1.665 d1= 0.593 nd1 1.5457 v1 55.95R2 1.640 d2= 0.070 R3 1.520 d3= 0.181 nd2 1.6672 v2 20.41 R4 1.443 d4=0.264 R5 3.638 d5= 0.383 nd3 1.5457 v3 55.95 R6 3.502 d6= 0.037 R7 2.891d7= 0.395 nd4 1.5456 v4 56.03 R8 −53.755 d8= 0.477 R9 2.909 d9= 0.519nd5 1.5457 v5 55.95  R10 −12.934  d10= 0.774  R11 7.450  d11= 0.212 nd61.5456 v6 56.03  R12 1.573  d12= 0.350  R13 ∞  d13= 0.210 ndg 1.5168 vg64.17  R14 ∞  d14= 0.321

Table 6 shows aspherical surface data of each lens of the camera opticallens 20 in Embodiment 2 of the present disclosure.

TABLE 6 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10A12 A14 A16 R1  6.1421E−01 −3.5291E−02  4.0048E−02 −1.5196E−01 2.9569E−01 −3.2096E−01  1.7300E−01 −3.4182E−02 R2 −1.5103E+01−8.9101E−02  2.2141E−01 −3.1960E−01  3.9073E−01 −2.2912E−01 −2.3483E−02 1.0125E−01 R3 −4.2101E+00 −4.2649E−01  5.3402E−01 −2.8026E−01−1.0876E−02  5.7270E−02 −1.4803E−01  1.2368E−01 R4 −1.0900E+00−2.0788E−01  3.0359E−01 −4.7683E−01  1.2840E+00 −2.3948E+00  2.0759E+00−7.9290E−01 R5  8.7208E+00 −4.0526E−02 −4.3061E−02  1.2340E−01−8.3619E−01  1.5958E+00 −1.3534E+00  3.7956E−01 R6 −5.9058E+01−3.5267E−01 −1.2819E−01  1.4727E+00 −2.7531E+00  2.4457E+00 −1.1026E+00 2.8921E−01 R7  2.9339E+00 −6.6182E−01  4.2736E−01  1.3402E−01 4.5316E−01 −1.7926E+00  1.7116E+00 −5.2392E−01 R8  2.2491E+03−2.6506E−01  5.6787E−02  3.0387E−01 −4.1079E−01  2.0851E−01 −5.1792E−02−2.7809E−03 R9 −3.4879E+01 −1.4474E−02 −1.5093E−01 −5.9769E−02 3.4552E−01 −3.2953E−01  1.3733E−01 −2.2915E−02  R10 −3.5923E+02−6.8635E−02 −1.3982E−02 −8.8883E−02  1.4960E−01 −7.8317E−02  1.7110E−02−1.2205E−03  R11 −3.3768E+03 −3.0062E−01  1.3095E−01  2.1038E−03−1.5105E−02  4.2516E−03 −4.4576E−04  1.2070E−05  R12 −1.0560E+01−1.6046E−01  1.1953E−01 −5.1514E−02  1.4225E−02 −2.4703E−03  2.4475E−04−1.0460E−05

Table 7 and table 8 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 20 according toEmbodiment 2 of the present disclosure.

TABLE 7 Number of Inflexion Inflexion Inflexion Inflexion inflexionpoint point point point points position 1 position 2 position 3 position4 P1R1 0 P1R2 0 P2R1 1 0.415 P2R2 1 0.725 P3R1 1 0.585 P3R2 2 0.2250.825 P4R1 2 0.225 0.795 P4R2 0 P5R1 1 0.415 P5R2 1 1.065 P6R1 3 0.1251.135 1.935 P6R2 3 0.455 1.355 2.305

TABLE 8 Number of Arrest point Arrest point arrest points position 1position 2 P1R1 0 P1R2 0 P2R1 0 P2R2 0 P3R1 1 0.825 P3R2 2 0.405 0.935P4R1 2 0.405 0.975 P4R2 0 P5R1 1 0.715 P5R2 1 1.375 P6R1 2 0.235 1.785P6R2 0

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and650 nm after passing the camera optical lens 20 according to Embodiment2. FIG. 8 illustrates a field curvature and a distortion of light with awavelength of 555 nm after passing the camera optical lens 20 accordingto Embodiment 2.

As shown in Table 9, Embodiment 2 satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 1.933 mm. The image height of 1.0H is 2.9335 mm. The FOV (fieldof view) is 77.28°. Thus, the camera optical lens has a wide-angle andis ultra-thin. Its on-axis and off-axis chromatic aberrations are fullycorrected, thereby achieving excellent optical characteristics.

TABLE 9 Parameters and conditions Embodiment 1 Embodiment 2 f  3.5163.615 f1 33.367 27.110 f2 −1.843E+10 −723.459 f3 −2760.416 −1.657E+09 f45.098 5.041 f5 4.506 4.403 f6 −4.131 −3.701  f12 31.386 26.644 FNO 1.871.87 f1/f  9.49 7.50 R3/d3 6.73 8.40

It can be appreciated by one having ordinary skill in the art that thedescription above is only embodiments of the present disclosure. Inpractice, one having ordinary skill in the art can make variousmodifications to these embodiments in forms and details withoutdeparting from the spirit and scope of the present disclosure.

What is claimed is:
 1. A camera optical lens, comprising, from an objectside to an image side: a first lens; a second lens having a negativerefractive power; a third lens having a negative refractive power; afourth lens; a fifth lens; and a sixth lens, wherein the camera opticallens satisfies following conditions:6.25≤f1/f≤9.75; and5.87≤R3/d3≤14.20, where f denotes a focal length of the camera opticallens; f1 denotes a focal length of the first lens; R3 denotes acurvature radius of an object side surface of the second lens; and d3denotes an on-axis thickness of the second lens.
 2. The camera opticallens as described in claim 1, wherein the first lens has a positiverefractive power, and comprises an object side surface being convex in aparaxial region and an image side surface being concave in the paraxialregion, and the camera optical lens further satisfies followingconditions:64.28≤(R1+R2)/(R1−R2)≤200.23; and0.05≤d1/TTL≤0.19, where R1 denotes a curvature radius of the object sidesurface of the first lens; R2 denotes a curvature radius of the imageside surface of the first lens; d1 denotes an on-axis thickness of thefirst lens; and TTL denotes a total optical length from the object sidesurface of the first lens to an image plane of the camera optical lensalong an optic axis.
 3. The camera optical lens as described in claim 2,further satisfying following conditions:102.84≤(R1+R2)/(R1−R2)≤160.19; and0.08≤d1/TTL≤0.15.
 4. The camera optical lens as described in claim 1,wherein the object side surface of the second lens is convex in aparaxial region, and an image side surface of the second lens is concavein the paraxial region, and the camera optical lens further satisfiesfollowing conditions:−1.05*10¹⁰ ≤f2/f≤−1330.43;16.35≤(R3+R4)/(R3−R4)≤57.77; and0.02≤d3/TTL≤0.07, where f2 denotes a focal length of the second lens; R4denotes a curvature radius of the image side surface of the second lens;and TTL denotes a total optical length from an object side surface ofthe first lens to an image plane of the camera optical lens along anoptic axis.
 5. The camera optical lens as described in claim 4, furthersatisfying following conditions:−6.55*10⁹ ≤f2/f≤−166.79;26.17≤(R3+R4)/(R3−R4)≤46.22.
 6. The camera optical lens as described inclaim 1, wherein the third lens comprises an object side surface beingconvex in a paraxial region and an image side surface being concave inthe paraxial region, and the camera optical lens further satisfiesfollowing conditions:−9.17*10⁸ ≤f3/f≤−523.43;23.63≤(R5+R6)/(R5−R6)≤79.23; and0.04≤d5/TTL≤0.13, where f3 denotes a focal length of the third lens; R5denotes a curvature radius of the object side surface of the third lens;R6 denotes a curvature radius of the image side surface of the thirdlens; d5 denotes an on-axis thickness of the third lens; and TTL denotesa total optical length from an object side surface of the first lens toan image plane of the camera optical lens along an optic axis.
 7. Thecamera optical lens as described in claim 6, further satisfyingfollowing conditions:−5.73*10⁸ ≤f3/f≤−654.29;37.81≤(R5+R6)/(R5−R6)≤63.39; and0.06≤d5/TTL≤0.10.
 8. The camera optical lens as described in claim 1,wherein the fourth lens has a positive refractive power, and comprisesan object side surface being convex in a paraxial region and an imageside surface being convex in the paraxial region, and the camera opticallens further satisfies following conditions:0.70≤f4/f≤2.18;−1.82≤(R7+R8)/(R7−R8)≤−0.60; and0.04≤d7/TTL≤0.12, where f4 denotes a focal length of the fourth lens; R7denotes a curvature radius of the object side surface of the fourthlens; R8 denotes a curvature radius of the image side surface of thefourth lens; d7 denotes an on-axis thickness of the fourth lens; and TTLdenotes a total optical length from an object side surface of the firstlens to an image plane of the camera optical lens along an optic axis.9. The camera optical lens as described in claim 8, further satisfyingfollowing conditions:1.12≤f4/f≤1.74;−1.14≤(R7+R8)/(R7−R8)≤−0.75; and0.06≤d7/TTL≤0.10.
 10. The camera optical lens as described in claim 1,wherein the fifth lens has a positive refractive power, and comprises anobject side surface being convex in a paraxial region and an image sidesurface being convex in the paraxial region, and the camera optical lensfurther satisfies following conditions:0.61≤f5/f≤1.92;−1.27≤(R9+R10)/(R9−R10)≤−0.41; and0.05≤d9/TTL≤0.17, where f5 denotes a focal length of the fifth lens; R9denotes a curvature radius of the object side surface of the fifth lens;R10 denotes a curvature radius of the image side surface of the fifthlens; d9 denotes an on-axis thickness of the fifth lens; and TTL denotesa total optical length from an object side surface of the first lens toan image plane of the camera optical lens along an optic axis.
 11. Thecamera optical lens as described in claim 10, further satisfyingfollowing conditions:0.97≤f5/f≤1.54;−0.79≤(R9+R10)/(R9−R10)≤−0.51; and0.09≤d9/TTL≤0.13.
 12. The camera optical lens as described in claim 1,wherein the sixth lens has a negative refractive power, and comprises anobject side surface being convex in a paraxial region and an image sidesurface being concave in the paraxial region, and the camera opticallens further satisfies following conditions:−2.35≤f6/f≤−0.68;0.77≤(R11+R12)/(R11−R12)≤2.45; and0.02≤d11/TTL≤0.15, where f6 denotes a focal length of the sixth lens;R11 denotes a curvature radius of the object side surface of the sixthlens; R12 denotes a curvature radius of the image side surface of thesixth lens; d11 denotes an on-axis thickness of the sixth lens; and TTLdenotes a total optical length from an object side surface of the firstlens to an image plane of the camera optical lens along an optic axis.13. The camera optical lens as described in claim 12, further satisfyingfollowing conditions:−1.47≤f6/f≤−0.85;1.23≤(R11+R12)/(R11−R12)≤1.96; and0.04≤d11/TTL≤0.12.
 14. The camera optical lens as described in claim 1,further satisfying a following condition:3.69≤f12/f≤13.39, where f12 denotes a combined focal length of the firstlens and the second lens.
 15. The camera optical lens as described inclaim 14, further satisfying a following condition:5.90≤f12/f≤10.71.
 16. The camera optical lens as described in claim 1,wherein a total optical length TTL from an object side surface of thefirst lens to an image plane of the camera optical lens along an opticaxis is smaller than or equal to 5.26 mm.
 17. The camera optical lens asdescribed in claim 16, wherein the total optical length TTL of thecamera optical lens is smaller than or equal to 5.02 mm.
 18. The cameraoptical lens as described in claim 1, wherein an F number of the cameraoptical lens is smaller than or equal to 1.93.
 19. The camera opticallens as described in claim 18, wherein the F number of the cameraoptical lens is smaller than or equal to 1.89.